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1982～1984年奥卢市空气中有害物质测定结果显示SO_2年平均浓度及30 min最高浓度分别为23和807μg/m~3,颗粒性物质分别为31和291μg/m~3,NOx分别为15和161 μg/m~3,H_2S分别为2.3和177 μg/m~3,属于低水平空气污染城市。为探讨低水平空气污染在儿童上呼吸道感染中的作用,作者进行了此次研究。研究对象为奥卢市及另外2个无工业污染小城镇的儿童,其中包括在1982年底年龄为14～18个月的幼儿679名,6岁学龄前儿童759名。研究方法是向受试者父母了解儿童家庭住
The results of air pollutants in Oulu City from 1982 to 1984 showed that the maximum concentrations of SO2 in the 30 min and 307 min were 23 and 807 μg / m ~ 3, respectively, with particulate matter of 31 and 291 μg / m ~ 3 and NOx of 15 And 161 μg / m ~ 3 respectively, H_2S were 2.3 and 177 μg / m ~ 3, respectively, belonging to low-level air pollution cities. To investigate the role of low-level air pollution in children with upper respiratory tract infections, the authors conducted this study. The study population included children in Oulu City and two other small towns without industrial pollution, including 679 children aged 14 to 18 months and 759 preschool children aged 6 years at the end of 1982. The research method is to understand the parents of the children of the subjects to live